Drilling machine



Sept. 11, 1923.

J. W. BROWN. JR

DRILLING MACHINE Sept. 1 1, 1923. l,467,526

J. w. BROWN. JR

DRILLING MACHINE Filed July l0a 1920 4 Sheets-Sheet 2 lll/[III l l 'will/Ill Sept. 11, 1923. ,467.526

. .1. w. BROWN, JR

DRILLI NG MACHINE Filed July l0. 1920 4 Sheets-Sheet 5 ifi-57.6

Sept l l, 1923.

J. W. BROWN,` JR

DRlLLING MAQHINE Filed July lO 1920 4 Sheets-Sheet 4 Patented Sept. l1, 1923.

UNITED STATES JOHN WILSON BROWN, JR., 0F PHILADELPHIA, PENNSYLVANIA.

DRILLING MACHINE.

Application ined July 1o, 1920. seriai No. 395,343.

To all lwhom z't may concern:

Be it known that I, JOHN WILSON BnowN, Jr., a citizen ofthe United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Drilling Machines, of which the following is a specication.

My invention relates to certain improvements in drilling machines of the type in which a number of spindles are operated by a single driving mechanism and in which the work is carried by independent tables one for each spindle.

One object of my invention -is to improve the construction of a. drilling machine of this type and to provide mea-ns for driving the spindles and for rotating the carrier for the tables and the spindles.

Another object of the invention is to provide means for moving the tables vertically ns the carrier rotates and to provide means for vertically adjusting the tables in respect to the spindles.

In the accompanying drawings:

Fig. 1 is a vertical sectional view of my improved drilling machine;

Fig. 2 is a sectional plan view on the line 2 2, Fig. 1;

Fig. 3 is a sectional view on the line 3 3, Fi". 1;

Fig. 4 is a sectional view on the line 4 4, Fig. 1;

Fig. 5 is a vertical sectional view on the line 5 5, Fig.l 2; l

Fig. 6 is a. detached sect ional perspective view, showing the carrier rings at the upper portion of the machine;

Fig. 7 is a detached perspective view of one of the tables;

Fig. 8 is a diagrammatic view, showing the drive for the rings; and

Fig. 9 is aA side View of the cam ring.

Referring to the drawings, 2 is a hollow standard having a' base 1. The standard, in the present instance, is made separate from the base and is secured thereto by bolts 2B. On the standard is a cap plate 3, held in position by bolts 4. On the base of the standard is an external screw thread 5 on which is a threaded ring Shaving gear teeth 7 on its periphery, which mesh with the teeth of a worm 8 mounted on, or forming part of, a shaft 9 having its bearings in a projection 25 at one side of a supporting ring 10. An apron 11 snugly fits the lower portion of the base 1 and has a iange 12 eX- tendingoven the adjustable ring 6. This supporting ring carries an annular section 13, which is mounted to slide vertically .on

a carrier 14, but is arranged to turn therewith. Between the supporting ring 10 and the annular section 13 is a series of antifriction balls 15 adapted to ways in the supporting ring and carrier, as clearly shown in Fig. 1. The carrier 14 has an annular ring 16 at the lower end, beveled, as shown, and secured to the base is a ring 17 having an annular raceway for the reception of the anti-friction balls 18. l

Mounted on the upper end of the carrier is a series of anti-friction balls 19 adapted to bear against the beveled ring 20 on the standard and located, in the present instance, in a groove in av gear ring described hereinafter. On the supporting ring 10 is a cam ring 21 of the shape illustrated in Fig. 9. The lowest portion of the cam ring is on the left hand side of the figure and the highest portion is at the point indicated by 21". This ring has a series of teeth 22 near its periphery. These teeth are engaged by` a pawl 23 on a pivot 24 mounted on the annular section 13 carrying the tables.

Mounted in the annular section 13 is a series of plungers 26 of the construction illustrated in Fig. 7. Each plunger is made in two parts 27 and 28, each having keys adapted to keyways in the section 13 so that they are free to be raised and lowered, but are held from turning therein. The sections can be moved towards and from each other by a double adjustable screw 29 having a head located between the two screw-threaded sections. One portion has a right hand thread and the other portion has a left hand thread. In the lower section 26 is mounted a conical roller 30 adapted to travel on the cam ring 21. the bearing face of which is slightly beveled to correspond with the bevel of the rollers. On the upper section is a table 31 on which the work to be drilled is placed.

On the section 13, under each table, is a set screw 32 which acts as a stop to limit the movement of the table in one direction. Carried on the upper portion 14a of the carrier 14 are the drill spindles 33. There is a spindle in line with each table 31. These spindles are mounted in ball bearings 34 at the upper and lower ends of the portion 14*` ofthe carrier. of any suitable form desired.

These ball bearings may be In the lower end of each spindle, in the present instance, is a tapered opening shown by dotted lines for the reception of the tapered shank of the drill bit. The shape of this opening depends upon the character of the bit which it is desired to use. On the upper end of each spindle 33 is a pinion 35, which meshes with the teeth 36 on the periphery of a gear ring 37, supported .by the:

carrier 14. This gear ring has an inner flange, which underlaps a smaller gear ring 38, which is secured by bolts 39 to the carrier 14, as shown in Fig. 1. The cap plate 3 has an opening 40 in line with the several spindles 33 so that access can be had to the gearing and the spindles when necessary. These openings are closed by small caps 41, shown clearly in Figs. 1 and 2.

Mounted on the cap plate 3 are bearings 42 and 43 and located in the bearing 42 is a shaft 44 having a beveled gear wheel 45 which meshes with the teeth of the'inner ring 38. In the bearing 43 is a shaft 46 whichmeshes with the beveled teeth of the outer ring 37. The bearing 43 is provided with anti-friction bearings 48 of any suitable type. On the end of the shaft 46 is a gear wheel 49, which meshes with a pinion 51 on a driving shaft 50 adapted to suitable bearings 52. On this shaft 50 is a Wheel 53 around which passes a driving belt. On the opposite end of the shaft 50 from the pinion 51 is a pinion 54, which meshes with a gear wheel 55 on an eccentric hub 56 Which, in turn, is mounted on a reduced extension 44a of the shaft 44. On the reduced portion 44b of the shaft 44 is a gear wheel 57 having internal teeth which mesh with the external inner row of teeth in the double spur gear wheel 58 `mounted on the eccentric hub 56, the outer row of teeth meshing with a fixed set of teeth 59 on a shell 60 forming an internal part of the bushing of the bearing 42, in the present instance, and e-nclosing a portion of the gear wheel 55.

By this construction, the carrier is rotated at a very slow speed, while the spindles are driven at a comparatively high speed.

The operation of the drilling machine is as follows: The work is placed on the tables 31 and secured thereto in any suitable manner and the drill bits are placed in the spindles. When power is applied, the spindles rotate at the ordinary speed, depending upon the character of the Work being drilled, while the carrier rotates slowly around the standard 2 due to the planetary gearing between the maindriving'shaft and the shaft 44. As the carrier travels slowly around the standard the rollers 30 travel on the cam ring 21 and gradually raise the tables as the drills are cutting. Consequently, a hole will be drilled to a given depth according to the design of the cam ring. When the carrier has made a complete revolution the tables are lowered so that the work will be clear of the drills, at which point the work can be removed from each table as it passes this point and other work located thereon when the above operation will be repeated.

0n turning the screw ring 6 by the Worin wheel 8, the annular section 13 of the carrier can be adjusted towards and from the drill spindles so as toset the tables for the particular work to be drilled.

This invention is especially adapted for use in drilling a large number of small parts. When the drilling machine has been set, the parts can be placed on the tables at a given point and removed Vtherefrom so that the machine is kept in constant operation, but it will be understood that the invention can be used for drilling any suitable work according to the size of the machine and the number of spindles and tables may be varied as desired.

56a is a safety key of comparatively soft metal, which secures the gear wheel 55 to the hub 56. Should this key be Sheared, the pawl 23, which engages the teeth 22 on the cam ring, will prevent the mechanism turning in the reverse direction.

I claim 1. The combination in a drilling machine, of a standard; a carrier free to turn around the standard; an adjustable section adapted to turn with the carrier and to slide vertically thereon; tables vertically movable in said section: spindles mounted on the upper portion of the carrier; means for slowly rotating the carrier; means for independently driving the spindles; means for raising the tables as the carrier travels around the standard so that the work mounted on the tables can be fed to the drills; and means for adjusting the table-raising means and the table-carrying section.

2. The combination in a drilling machine, of a standard; a carrier adapted to rotate around the standard; a series of drill spindles mounted on theupper portion of the carrier; means for rotating the drill spindles; an annular section of the carrier arranged to slide vertically thereon and capable of' turning therewith; a series of tables on the said section in line with the spindles; a cam ring arranged to raise the tables gradually; an adjustable supporting ring carrying the cam ring and supporting the annular section of the carrier; and means for adjusting the supporting ring so as to adiust the carrier vertically.

3. The combination of a standard: a cap plate secured to the standard; a carrier mounted so as to rotate around lthe standard; a series of drill spindles mounted on the upper portion. of the carrier; an annular section mounted on the lower portion of the carrier. said section being arranged to rot-ate with the carrier yand to slide verfor rotating the screw rin to raise and lower the annular section of t e carrier and itstables.

4. The combination of a standard; a cap plate secured to the standard; a driving shaft; two intermediate shafts having bearings carried by the cap plate; a carrier arranged to rotate around the standard; a series of spindles on the upper portion of the carrier; means for supporting the work; a pinion on each drill spindle; two rings,- one within the other, the outer ring having a series of teeth meshing with the pinions on the spindles, said ring also having beveled teeth; a bevel wheel on one of the intermediate shafts for driving said outer ring, the inner ring being secured to the carrier; a bevel wheel on the other intermediate shaft meshing with the teeth on said inner ring; and means for imparting a slow motion through said gears to the carrier and ya faster motion to the spindles.

5. The combination in a-drilling machine, of a standard having a screw thread on its base section; a threaded ring adapted to the threads of the base section, said ring having teeth on its periphery; a supporting ring bearing on lthe threaded ring; a worm carried by said supporting ring and meshing with the .teeth on the threaded ring; a carrier mounted to turn around the standard; spindles and tables on the carrier; and means for driving the spindles and for turning the carrier, the tables being vertically adjusted by turning the screw ring.

6. The combination of a standard having a base section; a. screw thread thereon; a threaded ring adapted to the threads of the base section; means for turning the ring; a supporting ring Isurrounding the base section and carried by rthe threaded ring; a carrier arranged to turn around the standard. said carrier having an integral upper portion: drill spindles on said portion: an annular section of the carrier arranged to turn therewith: a series of tables on the annular section in line with the spindles, the annular section of the carrier being supported by the adjustable supporting ring; a cam on said ring controlling the vertical movement of the tables; and means for driving the spindles and for turning the carrier.

7. The-combination of a standard; a carrier on the standard: drill spindles and ,same axis as t section.

tables on the carrier; means for moving the tables towards the spindles; two gear rings, one within the other and mounted on the carrier, the inner ring being secured to the carrier and the outer ring being free to turn independently of the carrier and having teeth on 'its periphery; a pinion on each drill spindle meshing with the lteeth on the j outer gear ring; and means for independently driving the two rings.

8. The combination in a drilling machine, of a standard; a cap plate secured to the standard; a carrier arranged to rotate around the standard; two gear rings; two shafts, each shaft having a gear meshing 'with a gear ring, said shafts being mounted in bearings in the cap plate; spindles on the carrier; means by which the spindles are driven from one of said rings, the other ring being attached to the carrier; andi means for supporting the work.

9. The combination in a drilling machine, of a carrier; spindl mounted on the carrier; a rotatin section revolvingl about the e carrier and synchronously with it; tables mounted on the section; and means for changing the relative position of the carrier and section in the direction of their common axis.

10. The combination in a drilling machine, of a carrier; spindles mounted on the carrier; a rotating section revolving about the same axis as the carrier and synchronously with it; tables mounted on the rotating section; a cam ring Iarranged to raise the tables gradually; and means for adjusting the cam ring in the direction of fthe axis of the carrier and rotating 11. The combination in a drilling machine, of a rotating carrier; spindles thereon; a rotating section revolving about thev same axis as the carrier and synchronously with section; a cam ring arranged to raise the tables gradually; means for adjusting the cam ring; and means for adjusting the tables severally inthe direction of the axis of the rotating section.

12. The combination in a drilling ma chine, of a revolving carrier; spindles mounted on the carrier; tables'on the carrier; a cam ring arranged' to raise the tables gradually; and means for adjusting the cam ring in the direction of the axis of the carrier.

13. In a drilling machine` the combination of a standard: a carrier adapted to revolve on said standard;'drill spindles and tables on the carrier; a ring cam; aligned slides for each table. one riding on said lcam and one secured to the table: and means for varying tile distance between the slides.

JOHN W'ILSON BROWN. JR.

it; tables mounted on the rota-tingv eov 

